Pls give the question to expect that u get answers from others
Thank u
Answer:

Step-by-step explanation:
Given


Required
Determine the difference
Represent this with d.
d is calculated using

The equation becomes

I'm sorry but your photo doesn't really show the whole paragraph clearly so I can't answer
Answer:
Step-by-step explanation:
Interval Notation:
(−∞,∞)
Set-Builder Notation:
{x|x∈R}